Article thumbnail

A combined perceptual, physico-chemical, and imaging approach to ‘odour-distances’ suggests a categorizing function of the drosophila antennal lobe

By Thomas Niewalda, Claire Eschbach, Julia Ehmer and Wen-chuang Chou

Abstract

How do physico-chemical stimulus features, perception, and physiology relate? Given the multi-layered and parallel architecture of brains, the question specifically is where physiological activity patterns correspond to stimulus features and/ or perception. Perceived distances between six odour pairs are defined behaviourally from four independent odour recognition tasks. We find that, in register with the physico-chemical distances of these odours, perceived distances for 3-octanol and n-amylacetate are consistently smallest in all four tasks, while the other five odour pairs are about equally distinct. Optical imaging in the antennal lobe, using a calcium sensor transgenically expressed in only first-order sensory or only second-order olfactory projection neurons, reveals that 3-octanol and n-amylacetate are distinctly represented in sensory neurons, but appear merged in projection neurons. These results may suggest that within-antennal lobe processing funnels sensory signals into behaviourally meaningful categories, in register with the physico-chemical relatedness of th

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.797.376
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • ftp://ftp.ncbi.nlm.nih.gov/pub... (external link)
  • ftp://ftp.ncbi.nlm.nih.gov/pub... (external link)
  • http://citeseerx.ist.psu.edu/v... (external link)

  • To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.

    Suggested articles